EP 0731094 B1 20000920 - Process for the preparation of pyrazoles
Title (en)
Process for the preparation of pyrazoles
Title (de)
Verfahren zur Herstellung von Pyrazolen
Title (fr)
Procédé pour la préparation de pyrazoles
Publication
Application
Priority
DE 19507915 A 19950307
Abstract (en)
[origin: EP0731094A1] Prodn. of pyrazoles of formula (I) comprises reacting a 3-alkoxy-2-propenylidene dialkyl ammonium chloride of formula (II) with a hydrazine cpd. of formula (III) in the presence of a base and opt. a diluent: R<1>-R<3> = alkyl; R = H, alkyl or opt. substd. cycloalkyl, aryl or aralkyl.
IPC 1-7
IPC 8 full level
C07D 231/12 (2006.01)
CPC (source: EP KR US)
C07D 231/12 (2013.01 - EP KR US)
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
EP 0731094 A1 19960911; EP 0731094 B1 20000920; BR 9600932 A 19971230; CN 1137522 A 19961211; DE 19507915 A1 19960912; DE 59605900 D1 20001026; ES 2151615 T3 20010101; JP H08245595 A 19960924; KR 960034179 A 19961022; TW 342387 B 19981011; US 5606074 A 19970225
DOCDB simple family (application)
EP 96102714 A 19960223; BR 9600932 A 19960306; CN 96104112 A 19960306; DE 19507915 A 19950307; DE 59605900 T 19960223; ES 96102714 T 19960223; JP 6891696 A 19960301; KR 19960005601 A 19960304; TW 85101226 A 19960201; US 61077396 A 19960304